diff --git a/requirements.txt b/requirements.txt
index f975917..513e320 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 pytest
 pytest-randomly
 pytest-xdist
-hypothesis
+hypothesis==6.50.1
 mutmut
 flake8
 flake8-bugbear